Built in 1990 and remodeled with entertaining in mind, the 20,248-square-foot manse features a two-story library, a theater, a library/study, a wine cellar, a gym, seven bedrooms and 10 bathrooms. The 1.7-acre property includes a tennis court, a swimming pool and an expansive motor court.

Musk, 41, founded Hawthorne rocket maker SpaceX. He co-founded electric car company Telsa Motors and the Internet payment company that would become PayPal.